Discrete Maths - Sets

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111. If f(x) and g(x) are defined on domains A, B respectively, then domain of f(x) + g(x) is

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Option : B
Explanation :

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112. The function f : R - {2} → R defined by f(x) = (x² + 2x)/(x -2) is

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Option : C
Explanation :

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113. If set S ={x I x is a student in your class} and relation x Ry ↔ x sits in the same row as y, then which of the following statements about R is TRUE?

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Option : D
Explanation :

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114. If set A has 3 elements and set B has 4 elements, then number of injections that can be deined from A into B is

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Option : C
Explanation :

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115. Number of bijective functions from set A to itself when A contains 106 elements, is

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Option : C
Explanation :

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